美国伊利诺伊技术研究所Thomas Er-ber教授开发了一项利用磁性有效地检测钢结构疲劳的新颖检测技术。Thomas Er-ber在美国物理杂志D分册应用物理的一篇文章中叙述了如何使型钢,甚至已消磁的型材几乎不存在按指定方向的基本方向磁自旋的原子团。当型钢经受挤压或者弯曲加工时,这些磁畴相互之间移动位置。检测人员可通过辅助磁场进行测试这些变化。当钢 Thomas Er-ber, a professor at the Illinois Institute of Technology, has developed a novel detection technique that uses magnetism to effectively detect fatigue in steel structures. In an article in Applied Physics, Part D of the American Physical Journal, Thomas Er-ber describes how there is almost no atomic spin of a beam, or even a demagnetized section, that magnetically spins in the basic direction of a given direction. When the steel is subjected to extrusion or bending process, these magnetic domains move to each other. Detectors can test these changes with a secondary magnetic field. When steel